Superfluid Transition of Helium-4 Under Heat Current and Reduced Gravity in a Low-g Simulator
Explore the source record for details and available documents.
helium-4 superfluid transition heat current low-gr↗
Engineering topics
Israelsson, U.
Publications and source records attributed to Israelsson, U..
Low Temperature Microgravity Physics Space Station Facility
A Low Temperature Microgravity Physics Facility under definition for the International Space Station satisfies or exceeds the recommendations of the Science Community and NASA Advisory Boards. LTMPF supports long term multiple experiment modules at low cost with frequent flight opportunities as often as every 20 months.
cryogenic↗
A Novel Silicon Micromachined Cryogenic Capacitive Pressure Transducer
Explore the source record for details and available documents.
cryogenic capacitive pressure transducer↗
Performance Improvement of the CHeX Flight Cryostat
The JPL flight cryostat last flew on the Space Shuttle in October 1992 in support of the Lambda Point Experiment. A new experiment, the Confined Helium Experiment (CHeX), now in development will reuse this cryostat. An improvement to the cryostat performance was necessitated by the CHeX experiment having a longer mission requirement and stricter requirements imposed by NASA with respect to a launch-scrub turnaround scenario. The parasitic heat load reduction necessary to relieve both constraints was about 15percent or 1 liter/day. The techniques implemented to achieve this goal, and subsequent results are presented along with a thermal model used during the analysis of the cryostat.
cryostats↗
The Lambda-Point Experiment: Helium Cryostat, Cryo-Servicing, Functions, and Performance
This paper describes the experiment to measure the singularity of the specific heat of helium around the lambda transition at 2.177 Kelvin, with nano Kelvin resolution.
Lambda-Point Experiment (LPE) helium crogenic syst↗
Low temperature research facilities for shuttle and beyond
This paper describes the Low Temperature Research Facility program now under development at the Jet Propulsion Laboratory. This program will develop the experiments and cryogenic facility to fly experiments requiring temperatures in the liquid helium range, from the superfluid range (1.6 K) to the critical point (5.2 K). A shuttle facility is planned for 1998. It will be flown about every two years after that time. A free flyer is also being evaluated for the end of the decade or early in the next century. A brief discussion of the quality of micro-gravity available in various carriers is also given.
Mason, P.↗
Technical challenges involved in supporting the Lambda Point Experiment
The Lambda Point Experiment (LPE) is one of the instruments included in the U.S. Microgravity Payload Mission 1 planned for one of the Space Shuttle flights in 1992. The objective of the experiment is to measure the heat capacity of liquid helium within a narrow interval around the transition between superfluid and normal helium (the lambda point) with an unprecedented temperature resolution of about 10 to the -10th. Multiple technical challenges are presented in the areas of structural support, safety analysis, and modal frequency tests. This paper describes the technical challenges of JPL's multidisciplinary involvement in support of these experiments in microgravity.
Petrac, D.↗